CN202535485U

CN202535485U - WiFi signal transmission system

Info

Publication number: CN202535485U
Application number: CN2012201028481U
Authority: CN
Inventors: 肖遥; 陈佐; 陈治; 谭佑平; 胡慧
Original assignee: Changsha Xingcheng Information Technology Co Ltd
Current assignee: Changsha Xingcheng Information Technology Co Ltd
Priority date: 2012-03-19
Filing date: 2012-03-19
Publication date: 2012-11-14
Anticipated expiration: 2022-03-19

Abstract

The utility model discloses a WiFi signal transmission system, which comprises a digital set-top box body, a mixer, a CATV coaxial cable and a converter. The mixer is used for synthesizing WiFi hotspots with CATV television signals to generate a channel of mixed signals and transmitting the channel of mixed signals to the digital STB body through the CATV coaxial cable. A tuner in the digital STB body is used for processing the CATV television signals and then outputting the processed signals to a television for users to watch through an output port. The converter consists of a radiating antenna, a high-pass filter circuit, a signal output port and a low-pass filter circuit. The radiating antenna connected with the high-pass filter circuit is used for radiating WiFi signals. The low-pass filter circuit is connected with the digital set-top box body through the signal output port. The WiFi signal transmission system has the advantages of simple structure and convenient operation, which improves the coverage quality of WiFi signals and enlarges the coverage area of WiFi signals.

Description

A kind of realization wifi signal system for transmitting

Technical field

The utility model is mainly concerned with the Wireless Communication Equipment field, refers in particular to a kind of realization wifi signal system for transmitting.

Background technology

Wifi be a kind of can be with PC, handheld device terminals such as (like PDA, mobile phones) with the interconnected technology of wireless mode, it provides the wireless broadband internet visit for the terminal use; Simultaneously, it also be at home, office or on the road online fast, convenient way.

In the prior art, the place that generally can visit the Wifi network is referred to as " Wifi focus ".Should " Wifi focus " create through accessing points is installed in Internet connection, this accessing points is transmitted wireless signal through short distance, and general coverage is 300 feet.When an equipment (for example Pocket PC) of supporting Wi-Fi when running into a focus; This equipment just can be connected to that network with wireless mode; For the user; This kind mobile Internet access mode is very convenient, and the user need not wiring, only need be in the hotspot coverage and just can use network; And because transmitting power is low, so it has more healthy and safe property with respect to alternate manner.

But, because the wireless signal that " wifi focus " transmits is the 2.4G high-frequency signal, so its transmission range is very limited.As stated, its coverage is merely 300 feet (being roughly equal to 90 meters), and because its frequency is high, wavelength is short; It is the signal of other low-frequency range relatively; Penetration loss property is big, has built up zones such as building, and baroque residential quarters for some; The loss meeting of signal is bigger, or even detects less than any signal.Therefore, often the user uses the wifi signal like needs in these regions, then need arrive spacious place.

In addition, along with the extensive of the commercialization of 3G and intelligent terminal popularized, the user also is more and more stronger to mobile network's diversified demand, and it also is increasingly high that the covering quality of network signal is required, and this just needs the wifi network coverage of densification.Though now on the wifi network coverage problem that solves zones such as residential quarters; Indoor covering engineering is a kind of solution effectively; But because it specifically is that to adopt with the antenna feeder is that main indoor distributed system goes actual solution, its need be in users home the intensive antenna transmission system that lays of routine property on the ceiling.Like this, often there are problems such as the user opposes, engineering construction difficulty, long construction period; Again because of this system antenna for being installed on the building corridor, its signal power is limited, so also exist the wireless path loss of registering one's residence bigger, the degree of depth covers problems such as wretched insufficiency.

Therefore, how to strengthen the transmission range of " wifi focus " signal, enlarge the wifi signal coverage areas and reduce the lossy that it penetrates, improve the covering quality of wifi signal, become the problem that current industry personage needs solution badly already.

The utility model content

The technical problem that the utility model will solve is: to the technical problem that prior art exists, the utility model provides a kind of simple in structure, easy to operate, covering quality that can improve the wifi signal, a kind of realization wifi signal system for transmitting that enlarges the wifi signal coverage areas; Promptly; Through having the CATV coax network of high rate into family; Through its transmission " wifi focus " signal, " wifi focus " signal in the room through aerial radiation, both avoided wireless signal and be penetrated into indoor uncertain factor by outdoor; The realization formula degree of depth of registering one's residence covers, and the signal that has extended " wifi focus " again covers.

In order to solve the problems of the technologies described above, the technical scheme that the utility model proposes is:

A kind of realization wifi signal system for transmitting comprises the top box of digital machine body; Also comprise frequency mixer, CATV coaxial cable and transducer; Said frequency mixer is used for wifi focus and synthetic one tunnel mixed signal of CATV TV signal and passes through the transmission of CATV coaxial cable; Tuner in the said top box of digital machine body is used for handling the CATV TV signal and exports television set to through output port and supplies the user to watch; Said transducer comprises radiating antenna, high-pass filtering circuit, signal output port and low-pass filter circuit; Said radiating antenna is connected in high-pass filtering circuit and is used to give off the wifi signal, and said low-pass filter circuit links to each other with the top box of digital machine body through signal output port.

Further improvement as the utility model:

The rf input interface of tuner links to each other on said low-pass filter circuit and the top box of digital machine body.

Said top box of digital machine body is the STB with wifi chip, said wifi chip be used for through wireless mode receive the wifi signal and through active gain after second radiating antenna that links to each other with the wifi chip launch.

Compared with prior art, the advantage of the utility model is:

1, the wifi focus immigration system of the utility model is based on the design of STB; Utilize the frequency division multiplexing characteristic of CATV coaxial cable; CATV TV signal, " wifi focus " signal are collected in the CATV coax network; Neither destroy existing subscriber household building structure, made full use of the extension network that the cable of cable TV of having built well in the users home has made up " wifi focus " signal again, increased the transmission range of focus signal; Simultaneously, because STB is very popularized,, reduce investment outlay so the expanded application on its basis can reduce basic cost.

2, the wifi focus of the utility model moves into system; Through STB with the wifi focus " signal radiate in the room; realized that omnibearing wireless signal indoor and house interior covers, avoided signal to be penetrated into indoor uncertain factor, solved existing in prior technology signal depth covering problem; reduced the loss of signal when wireless mode transmits, had the advantage of signal stabilization by outdoor.

3, the wifi focus of the utility model moves into system; For the community user of laying cable TV signal; This kind mode quite is to have moved back to focus in sub-district and the users home undoubtedly, the wireless signal stack that a plurality of STB is launched, and the focus signal has obtained strengthening greatly; For not carrying out the place that the two-way net of cable TV changes, this kind mode provides the possibility of two-way interaction for user and radio and TV operator, does not need rewiring, and construction is simple, has avoided two-way net to change the cost consumption that is brought.

4, the wifi focus of the utility model moves into system, can support wlan system, even the transmittability of GSM/TD system, also for the multiple service platform of mobile operator transmission channel efficiently is provided.

5, the wifi focus of the utility model moves into system, adopts the scheme of adapter, has exempted installation and with respect to the STB with WIFI chip, has reduced the decay of signal, has effectively strengthened the wifi signal.

In sum, the utility model can be realized the covering within the family of wifi signal, and family need not to buy wireless route; Wifi base station mode is set relative roof and the AP of family is directly put mode, realizes that cost is low, and coverage light; Need not to do that family transforms and construction, and owing to can frequency be reduced to 0-20Mhz during transmission under the EOC mode, thus can't transmit through branch distributor, and its limited bandwidth has only 10M, and the utility model can be accomplished more than the 150M; Because adopt CABLE realization wifi signal to register one's residence, its signal penetration capacity is strong, experience, and it is little to decay.

Description of drawings

Fig. 1 is the structural principle sketch map of a kind of embodiment of the utility model.

Fig. 2 is the structural principle sketch map of the another kind of embodiment of the utility model.

Fig. 3 is the Principle of Signal Transmission framework sketch map of Fig. 2.

Fig. 4 is the principle schematic of transducer in the specific embodiment.

Marginal data:

1, top box of digital machine body; 101, tuner; 102, rf input interface; 103, wifi chip; 2, frequency mixer; 3, CATV coaxial cable; 4, transducer; 5, radiating antenna; 6, high-pass filtering circuit; 7, signal output port; 8, second radiating antenna; 9, low-pass filter circuit.

Embodiment

Below in conjunction with accompanying drawing and specific embodiment the utility model is done further explain.

Like Fig. 1 and shown in Figure 4; The realization wifi signal system for transmitting of the utility model; Comprise top box of digital machine body 1; Top box of digital machine body 1 comprises the basic function parts that are used for accomplishing functions such as audio-video signal decoding, output, and it comprises STB CPU, tuner 101, rf input interface 102, demodulator, audio/video decoding unit and audio frequency and video output unit or the like; For example can adopt the top box of digital machine of the HI3100E chip of Hai Si.The immigration system of the utility model further comprises frequency mixer 2, CATV coaxial cable 3 and transducer 4; Frequency mixer 2 is used for wifi focus and synthetic one tunnel mixed signal of CATV TV signal and passes through 3 transmission of CATV coaxial cable; Tuner 101 in the top box of digital machine body 1 is used for handling the CATV TV signal and exports television set to through output port and supplies the user to watch; Transducer 4 comprises radiating antenna 5, high-pass filtering circuit 6, signal output port 7 and low-pass filter circuit 9, and high-pass filtering circuit 6 is for being used for the low-frequency CATV signal of filtering from the mixed signal of the CATV signal of CATV coaxial cable 3 inputs and wifi signal; Low-pass filter circuit 9 is for being used for the high-frequency wifi signal of filtering from the mixed signal of the CATV signal of CATV coaxial cable 3 inputs and wifi signal; Radiating antenna 5 is connected in high-pass filtering circuit 6 and is used to give off the wifi signal, and low-pass filter circuit 9 links to each other with top box of digital machine body 1 through signal output port 7.In the present embodiment, the rf input interface 102 of tuner 101 links to each other on low-pass filter circuit 9 and the top box of digital machine body 1.

Through the immigration system of said structure, can utilize frequency mixer 2 feed-ins " wifi focus " signal in the cable TV porch, transfer to the sub-district through CATV coaxial cable 3 then and export in each users home through the wide frequency division branch distributor.Because the frequency range of catv network use at present is 5～750MHz, and the public frequency range of WLAN is 2400～2483.5MHz, therefore, does not have juxtaposition between catv network and the mobile communications network frequency spectrum, can realize common cable transmission.For example, the road is closed in " cable TV porch " that above-mentioned CATV signal and wifi signal can be in the buildings, and " cable TV porch " is the coupling box of saying usually here, and in the practical application, this frequency mixer 2 can also adopt blender or mixer.

Referring to Fig. 2 and shown in Figure 3, in another embodiment, top box of digital machine body 1 can also adopt the STB with wifi chip 103.That is, top box of digital machine body 1 comprises parts such as tuner 101, wifi chip 103, demodulator, decoding unit, output unit and STB CPU.Wherein, The CATV signal is from rf input interface 102 inputs of tuner 101; Wherein the CATV signal exports demodulator to and carries out demodulation after down conversion process; Demodulation is after decoding unit decodes, and further under the control of STB CPU, exports television set to through output port and supply the user to watch.Wifi chip 103 receives the wifi signal through wireless mode, and through launching through second radiating antenna 8 that links to each other with wifi chip 103 once more after the active gain.

The processing procedure of above-mentioned wifi chip 103 is following:

1) has or not the wifi signal in the detection network; (that is, the STB CPU can remove to drive wifi chip 103 and remove search signal)

2), then therefrom obtain the information such as MAC Address, channel of wifi signal if having;

3) create virtual network device (promptly receiving the wifi signal);

4) according to information such as the MAC Address of the wifi signal that obtains, channels the said virtual network device in the step 3) is provided with, the virtual network device routing function is set simultaneously;

5) virtual network device has been provided with and has connected wifi;

6) wifi chip 103 is set and is ap mode (that is emission wifi signal).

Below only be the preferred implementation of the utility model, the protection range of the utility model also not only is confined to the foregoing description, and all technical schemes that belongs under the utility model thinking all belong to the protection range of the utility model.Should be pointed out that for those skilled in the art,, should be regarded as the protection range of the utility model in the some improvement and the retouching that do not break away under the utility model principle prerequisite.

Claims

1. realize wifi signal system for transmitting for one kind; Comprise top box of digital machine body (1); It is characterized in that: also comprise frequency mixer (2), CATV coaxial cable (3) and transducer (4); Said frequency mixer (2) is used for wifi focus and synthetic one tunnel mixed signal of CATV TV signal and passes through CATV coaxial cable (3) transmission; Tuner (101) in the said top box of digital machine body (1) is used for handling the CATV TV signal and exports television set to through output port and supplies the user to watch; Said transducer (4) comprises radiating antenna (5), high-pass filtering circuit (6), signal output port (7) and low-pass filter circuit (9); Said radiating antenna (5) is connected in high-pass filtering circuit (6) and is used to give off the wifi signal, and said low-pass filter circuit (9) links to each other with top box of digital machine body (1) through signal output port (7).

2. realization wifi signal system for transmitting according to claim 1 is characterized in that: said low-pass filter circuit (9) links to each other with the rf input interface (102) that top box of digital machine body (1) is gone up tuner (101).

3. realization wifi signal system for transmitting according to claim 1 and 2; It is characterized in that: said top box of digital machine body (1) is for having the STB of wifi chip (103), said wifi chip (103) be used for through wireless mode receive the wifi signal and through active gain after second radiating antenna (8) that links to each other with wifi chip (103) launch.